Susan Boyle and Elvis Presley's secret charity duet

IT IS set to be the Christmas No 1 - and generous Susan Boyle announced yesterday that all the royalties from her historic duet of O Come All Ye Faithful with the late Elvis Presley will be given to her favourite charity, Save The Children.

Britain's Got Talent contestant Susan Boyle is planning a very special duet for Christmas [PA]

Speaking at the launch in London where she was joined by Paul O'Grady, Susan spoke of her joy at being the first British artist to be allowed by the Presley estate to use the King's vocal track on someone else's recording. And the 52-year-old, an ambassador for Save The Children, says helping the charity is the icing on the cake: "Dueting with Elvis was beyond my wildest dreams and now that this is able to raise money and help children, it is simply fantastic." In a recorded message, music supremo Simon Cowell said he was "proud" of the star.

The Presley estate has allowed SuBo to use The King's vocals for the track [FREE PIC]

Dueting with Elvis was beyond my wildest dreams

Susan Boyle

Apparently Elvis's ex-wife, Priscilla Presley herself, gave the final nod of approval, speaking to Susan and asking her why the project meant so much to her.

Susan's impassioned reply about how Elvis was her father's hero sealed the deal.

The single will be released on December 8.

Elvis' ex-wife Priscilla gave the final approval for the charity project [GETTY]